diff --git a/src/FilterLists.Agent/FilterLists.Agent.csproj b/src/FilterLists.Agent/FilterLists.Agent.csproj
index 08a11096c..ceace7a57 100644
--- a/src/FilterLists.Agent/FilterLists.Agent.csproj
+++ b/src/FilterLists.Agent/FilterLists.Agent.csproj
@@ -35,6 +35,8 @@
     <PackageReference Include="Microsoft.CodeAnalysis.FxCopAnalyzers" Version="2.9.3" />
     <PackageReference Include="Microsoft.DotNet.Analyzers.Compatibility" Version="0.2.12-alpha" />
     <PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="2.2.0" />
+    <PackageReference Include="Microsoft.Extensions.Logging" Version="2.2.0" />
+    <PackageReference Include="Microsoft.Extensions.Logging.Console" Version="2.2.0" />
     <PackageReference Include="RestSharp" Version="106.6.9" />
   </ItemGroup>
 
diff --git a/src/FilterLists.Agent/ListArchiver/DownloadList.cs b/src/FilterLists.Agent/ListArchiver/DownloadList.cs
index f6567fc00..7403826bd 100644
--- a/src/FilterLists.Agent/ListArchiver/DownloadList.cs
+++ b/src/FilterLists.Agent/ListArchiver/DownloadList.cs
@@ -6,6 +6,7 @@
 using FilterLists.Agent.Entities;
 using FilterLists.Agent.ListArchiver.DownloadRequestsByFileExtension;
 using MediatR;
+using Microsoft.Extensions.Logging;
 
 namespace FilterLists.Agent.ListArchiver
 {
@@ -53,10 +54,12 @@ private static readonly Dictionary<string, Func<ListInfo, IRequest>> DownloadReq
                     {".zip", l => throw new NotImplementedException()}
                 };
 
+            private readonly ILogger<Handler> _logger;
             private readonly IMediator _mediator;
 
-            public Handler(IMediator mediator)
+            public Handler(ILogger<Handler> logger, IMediator mediator)
             {
+                _logger = logger;
                 _mediator = mediator;
             }
 
@@ -68,16 +71,19 @@ protected override async Task Handle(Command request, CancellationToken cancella
                     if (DownloadRequestsByFileExtension.ContainsKey(extension))
                         await _mediator.Send(DownloadRequestsByFileExtension[extension].Invoke(request.ListInfo),
                             cancellationToken);
-                    //TODO: handle and/or log unrecognized extension
+                    _logger.LogWarning(
+                        $"File extension not recognized for list {request.ListInfo.Id} from {request.ListInfo.ViewUrl}.");
                     //TODO:  upsert into MariaDB Rules table https://stackoverflow.com/questions/15271202/mysql-load-data-infile-with-on-duplicate-key-update
                 }
                 catch (NotImplementedException)
                 {
-                    //TODO: log
+                    _logger.LogWarning(
+                        $"File extension not supported for list {request.ListInfo.Id} from {request.ListInfo.ViewUrl}.");
                 }
-                catch (ArgumentException)
+                catch (ArgumentException ex)
                 {
-                    //TODO: log
+                    _logger.LogError(ex,
+                        $"Could not determine the file extension for list {request.ListInfo.Id} from {request.ListInfo.ViewUrl}.");
                 }
             }
         }
diff --git a/src/FilterLists.Agent/ListArchiver/DownloadRequestsByFileExtension/DownloadTxt.cs b/src/FilterLists.Agent/ListArchiver/DownloadRequestsByFileExtension/DownloadTxt.cs
index 1e5f0bbdc..8f0e9fb10 100644
--- a/src/FilterLists.Agent/ListArchiver/DownloadRequestsByFileExtension/DownloadTxt.cs
+++ b/src/FilterLists.Agent/ListArchiver/DownloadRequestsByFileExtension/DownloadTxt.cs
@@ -1,10 +1,10 @@
-using System.Diagnostics;
-using System.IO;
+using System.IO;
 using System.Net.Http;
 using System.Threading;
 using System.Threading.Tasks;
 using FilterLists.Agent.Entities;
 using MediatR;
+using Microsoft.Extensions.Logging;
 
 namespace FilterLists.Agent.ListArchiver.DownloadRequestsByFileExtension
 {
@@ -23,15 +23,17 @@ public Command(ListInfo listInfo)
         public class Handler : AsyncRequestHandler<Command>
         {
             private readonly HttpClient _httpClient;
+            private readonly ILogger<Handler> _logger;
 
-            public Handler(HttpClient httpClient)
+            public Handler(ILogger<Handler> logger, HttpClient httpClient)
             {
+                _logger = logger;
                 _httpClient = httpClient;
             }
 
             protected override async Task Handle(Command request, CancellationToken cancellationToken)
             {
-                Debug.WriteLine($"Downloading list {request.ListInfo.Id} from {request.ListInfo.ViewUrl}...");
+                _logger.LogInformation($"Downloading list {request.ListInfo.Id} from {request.ListInfo.ViewUrl}...");
                 try
                 {
                     using (var result = await _httpClient.GetAsync(request.ListInfo.ViewUrl, cancellationToken))
@@ -45,9 +47,10 @@ protected override async Task Handle(Command request, CancellationToken cancella
                             }
                     }
                 }
-                catch (HttpRequestException)
+                catch (HttpRequestException ex)
                 {
-                    //TODO: log
+                    _logger.LogError(ex,
+                        $"Error downloading list {request.ListInfo.Id} from {request.ListInfo.ViewUrl}.");
                 }
             }
         }
diff --git a/src/FilterLists.Agent/Program.cs b/src/FilterLists.Agent/Program.cs
index af6df94d6..2fa52e08e 100644
--- a/src/FilterLists.Agent/Program.cs
+++ b/src/FilterLists.Agent/Program.cs
@@ -7,6 +7,7 @@
 using FilterLists.Agent.ListArchiver;
 using MediatR;
 using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.Logging;
 
 namespace FilterLists.Agent
 {
@@ -30,6 +31,7 @@ private static void RegisterServices()
             var containerBuilder = new ContainerBuilder();
 
             // register Agent services
+            serviceCollection.AddLogging(b => b.AddConsole());
             serviceCollection.AddMediatR(typeof(Program).Assembly);
             containerBuilder.RegisterType<FilterListsApiClient>().AsImplementedInterfaces().SingleInstance();
             containerBuilder.RegisterType<HttpClient>().SingleInstance();